Rory has some 2-litre bottles of lemonade. Sarah has some 3-litre bottles of lemonade.
Altogether they have 27 litres.
Rory has 6 bottles more than Sarah.
Using simultaneous equations, find how many bottles each person has.

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

X+ y = 5 ; x - y =3 solve using linear combination

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.